4J47|Kaixin Alloy Materials Co., Ltd.-specializes in high-temperature alloys-corrosion-resistant alloys-expansion alloys-pure nickel alloys and other strips-wires-rods

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Danyang Kaixin Alloy Material Co., Ltd.

4J47

Product properties:

Brand: KX-Alloy

Similar grades：-

Certification certificate：ISO9001:2015

Place of Origin: Danyang, Jiangsu, China

Product Description

Alloy Category：Expansion alloy

Substrate shape: wire/strip/rod/pipe/plate

Alloy series: perminvar

Implementation standards：YB/T 5235

Applications: Aerospace, telecommunications, industrial fields

Product description and application

4J47 has an expansion coefficient near the soft glass in the temperature scale of 20 ~ 400℃, which is used for matching and sealing with the corresponding soft glass. This kind of alloy contains chromium, after oxidation treatment, the alloy surface formed a very dense oxide film, and the matrix is strong, and good infiltration with soft glass. Therefore, high strength sealing surfaces can be obtained. It is an important sealing structure data in electric vacuum industry.

4J47Composition content

Fe：50.01%~51.61%

Ni：46.8%~47.8%

Cr：0.8%~1.4%

Mn≤0.4%

Si≤0.3%

C≤0.05%

P≤0.02%

S≤0.02%

Vacuum induction furnace

Electroslag remelting

Product physical properties

Density

ρ=8.2 g/cm³

Fusing point

1350℃

Mechanical properties

Product thickness greater than 0.2mm strip performance:

Status code	Status	Tensile strength/MPa

S	Soft state	＜590
I	Hard state	＞700

Product average linear expansion coefficient:

Alloy designation	Sample heat treatment regime	Average linear expansion coefficient α/(10^-6/ K）

		20～ 400 ℃
Alloy47	It is heated to 1100±20 ℃ in vacuum or hydrogen atmosphere, held for 15min, and cooled to 200 ℃ or less at a speed of no more than 5 ℃/ min	8.1-8.7

Product typical mean linear expansion:

Alloy designation	Average linear expansion coefficient α (10^-6/ K）
	Average linear expansion coefficient α (10^-6/ K）
	20～ 100 ℃	20～ 200 ℃	20~300 ℃	20～400℃	20～450℃	20-500℃	20-600℃
Alloy47	8.1	8.6	8.3	8.3	-	9.1	10

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Application scenario

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